Light fitting for tubular electric lamps



OCtL9, 1951 ANNELL 2,570,303

LIGHT FITTING FOR TUBULAR ELECTRIC LAMPS Filed May 4, 1945 2 Sheets-Sheet l Oct. 9, 1951 A. H. ANNELL 2,570,303

LIGHT FITTING FOR TUBULAR ELECTRIC LAMPS Filed May 4, 1945 2 Sheets-Sheet 2 bar 4 by means of a set screw 6.

Patented Oct. 9, 1951 LIGHT FITTING TUBULAR. EIJECTRIC LAMPS Axel Hel-mer .Annell, Stockholm, .Sweden Application May 4, 1945, SerialNo. "591,918 In Sweden Ap1il 27,i1944 Section. 1,. Public Law .690, August .8, .1946 Patent expires April 27, 1964 4'1Glaims. 1

The present invention relates to light fittings for tubular electric lamps, and particularly for luminous discharge tubes.

The object of my invention 'is to provide an improved construction in "which lamp holders, lamp shade holders and reflectors, a member'for carrying said fitting may easily be placed in difierent positions for the purpose of adjusting the fittings according to different lengths of thelamps and so as to meet other requirements.

In the accompanying drawings Fig. lis acrosssection through the pendant of a fitting embodying my invention; Fig. 2 is a side-view of the parts shown in Fig. 1-; Fig. 3 is a 'side-view 'of the one end of the fitting; Fig. 4 is a cross-section of the fitting through one of the lamp holders; Fig. 5 is a section taken on line V--V of Fig. 4; Fig. 6 is an end-view of the fitting; Fig. '7 is an end-view of another embodiment; Figs. '8-10 are perspective views of different complete light fittings.

The parts of the light fittings :shown in the drawings are carried by a hollow, horizontal bar I having an I'cross-section. Tothe upper .and

lower flanges 2 and 3 respectively .of the ban there are attached different fastening-means "for lamp holders, ballast, pendant, holders for longitudinal side-shades of glass or reflectors and any other parts of the fittings. All these fastening-means except fastening-means for end-sheets H are displaceable along the horizontal bar and can be locked in anyrelative position on the bar according to the lengths of the lamps used. .As shown in Figs. 1.and.2, the pendant consisting of a tube 4 hanging down from a ceiling is screwed in a fastening-means 5 which is clutched at the upper flange 2 of the bar I and locked on the As the bar 4 abuts against the upper side of the bar I said fastening-means is alsoilocked on said bar I. Attached to the lower flange 3 of the bar I is a holder 1 -for a ballast by means of clamps 9 -fastened with screws 8 to the upper side of the holder .1. The clamps are pressed against the flange 3 by means of said screws .8. The luminous discharge tube I is indicated by dash and dot lines. The electric conducting wires I2 shown in dot lines are drawn, for example, from .a ceiling box not shown through the pendant '4 :and a hole II in the upper side of the bar I to the ballast 1 and the lamp holders.

As shown in Figs. 3-5, the junction box I3 for the lamp holders I4 is attached to the hollow bar I, for example at its ends, by means of clamps I which are pressed out of the material of the junc- 2 tion box I3. The-clamps clutch at the flange 3 when the junction box is pushed from 'on'eend'of the baronto the flange 3 when the box is locked "by'means of a screw I6 screwed in one of the clamps I5 and down against the flange 3. Thus,

"it is easy to adjust the position of "the lamp holdersaccording to dilTerent lengths of the luminous discharge tube III.

A sheet I! for supporting "glass shades I8 or reflectors, Fig. 6, in order to screen oii the lamps are carried by "a fastening-means I9 forming an angle with said sheet. Said means I9 is riveted to thesheet I1 and has an open sleeve-like extens'ion '20'which is formed in such a manner that it embraces the upper flange '2 of thebar 'II. Toithe extension 20 of the fastening-means IEl there is attached aspring 21 provided at its free end with a pin 22. When the sleeve 2!] is pushed onto the flange 2 the pin 22 snaps into a hole 23 in the upper side of the bar I. Thus, the sheet I1 and its fastening-means I9 are prevented from sliding off the bar I unintentionally. Thesheet I! is provided with lugs or dents 24 carrying glass shades I8 or thelike.

iInFig. '7, there is shown an embodiment provided with shade holders 25 which are adjustable as to their inclination. The shade holders 25 are attached to the bar I by means of a hand-like fastening-means 26 having a part 21 on either side projecting obliquely from the bar .I.. .The fastening-means 25 is provided with lugs 28 pressed out of the material of the bandit, which lugs clutch the upper flange 2 of the bar I. A screw 29 screwed in the fastening-means 26 looks the latter in its position on the bar I.

The shade holders 25 are hinged on the parts 21.. The shade holders consist of a metal band bent .back at its both ends so that a frame is .formed in which a glass shade may be inserted and, if desired, be kept by means of locking springs. The hinges are formed by providing the parts 21 as well as the holders 25 with lugs 36 which are bent through right angles. Pivots 3| are inserted in holes in said lugs 30. By means of screws 32 screwed in the parts 21 and abutting with their point against the holders 25 the latter may be adjusted into different angular positions. On the lefthand of Fig. '7 the holder 25 occupies the position' in which the holder forms the smallest angle with the vertical line whereas the holder on the righthand is adjusted into a position turned more upwards. Thus, the aperture angle of the light fitting can be varied and the fitting may be adjusted for different purposes so that the same fitting can have a limited vertical lighting effect as well as a flat lighting effect.

Holders of the kind shown in Fig. '7 are preferably placed at the ends of a fitting and if the fitting is of considerable length also between the ends at convenient intervals.

Similar holders as those shown in Fig. 7 may also be used for carrying metal shades or reflectors.

The holders 25 may also be used turned upwards. The appearance of a fitting provided with shade holders turned upwards will be clear when Fig. 7 is turned upside down, except that the pendant is to be moved. However, the screws 32 are to be connected with the holders in such a manner that the latter are always kept in contact with the screws and move together with the screws. For example, the screw may be provided with a flat rivet head at the point, which is kept by lugs provided on the holders.

In Fig. 8 a ceiling fitting without shades or reflectors is shown. For example, this fitting may be used in workshops having a low ceiling. It is attached directly to the ceiling by means of screwing members 33.

Fig. 9 shows a fitting suspended by a tube pendant and provided with glass shades inserted in holders of the kind shown in Fig. '7. By varying the inclination of the holders, the fitting may be given a vertical as well as a flat lighting effect.

Fig. 10 shows a fitting intended for use in offices, shops or the like and provided with glass shades carried by end sheets of the kind shown in Figs. 3 and 6. As this fitting is open upwards as well as downwards its efficiency is very good.

In a fitting to be equipped with two or more parallel lamps, it is only necessary to construct the junction boxes for the lamp holders for a corresponding number of lamps and to attach these boxes to the horizontal bar; The necessary ballast may in that case be attached one after the other to the bar.

According to the invention it is also possible, by means of a horizontal bar and fasteningmeans adjustable into diiferent positions on said bar, to construct long ramp fittings by giving the horizontal bar any desirable length or by assembling several fittings by means of joints also attached to the horizontal bar. Also wires or chains may be used as pendants for the fitting.

A fitting according to the invention can also easily be changed or reconstructed, as desired.

What I claim is:

1. In a lighting equipment for luminous discharge tubes, a horizontal bar having substantially an I-cross section including upper and lower flanges and a web, the web of said section being hollow, lamp holders, a ballast, lamp shade holders, at least one member for supporting said bar, means fastening said lamp holders and ballast on the lower flange of said bar, means fastening said shade holders and member on the upper flange of said bar, said fastening means being displaceable along said bar, means for looking said fastening means in different positions on said flanges, and electric conducting wires located in the hollow web of said bar connecting said lamp holders and said ballast with a source of current.

2. In a lighting equipment for luminous discharge tubes, a horizontal bar having substantially an I-cross section including upper and lower flanges and a web, the web of said section being hollow, lamp holders, a ballast, holders for longitudinal side-shades, at least one member for supporting said bar, means fastening said shade holder and member on the upper flange of said bar, said shade holders being adjustable as to their inclination, means fastening said lamp holders and ballast on the lower flange of said bar, said fastening means being displaceable along said bar, means for locking said fastening means in different positions on said flanges, and electric conducting wires located in the hollow web of said bar connecting said lamp holders and said ballast.

3. In a lighting equipment for luminous discharge tubes, a horizontal bar having substantially an I-cross section including upper and lower flanges and a web, the web of said section being hollow, lamp holders, a ballast, band-like members having a part on either side of said bar projecting obliquely, shade holders hinged on said parts, a screw screwed on said parts and abutting with its point against said shade holders, at least one member for supporting said bar, means fastening said lamp holders and ballast on the lower flange of said bar, means fastening said band-like members and supporting member on the upper flange of said bar, said fastening means being displaceable along said bar, means locking said fastening means in different positions on said flanges and electric conducting wires located in the hollow web of said bar connecting said lamp holders and said ballast.

4. In 'a lighting equipment for luminous discharge tubes, a horizontal bar having substantially an I-cross section including upper and lower flanges and a web, the Web of said section being hollow, lamp holders, a ballast, lamp shade holders, at least one member for supporting said bar, clamps and appertaining screws on said lamp holders and ballast, said clamps engaging the lower flange of the bar and being displaceable along said lower flange, the said screws cooperating with the clamps and said lower flange to lock said lamp holders and said ballast in different positions on the lower flange of the said bar, additional clamps and appertaining screws on said shade holders and member, said last named clamps engaging the upper flange of the bar and being displaceable along said upper flange, and said last named screws cooperating with the last named clamps and the upper flange to lock said lamp shade holders and member in different positions on said upper fiangeof the bar.

AXEL HELMER ANNELL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 991,603 Brooks May 9, 1911 2,284,534 Orth May 26, 1942 2,291,489 Naysmith July 28, 1042 2,291,491 Naysmith July 28, 1942 2,295,788 Hoeveler Sept. 15, 1942 2,314,103 Raizner Mar. 16, 1943 2,314,420 Orth Mar. 23, 1943 2,329,268 Heath Sept. 14, 1943 2,336,414 Mitchell Dec. 7, 1943 2,359,008 Naysmith Feb. 19, 1946 

